main()
{
    long long s,n,x,r,i;
    while(scanf("%I64d",&n)+1){
    s=1;
    for(i=2;i*i<=n;i++){
             if(n%i==0){
             x=1;r=0;
             while(n%i==0){
             n/=i;x*=i;
             r++;
             } 
             s*=(r+1)*x-r*x/i;         
             }
             }
             if(n>1)s*=2*n-1;
           printf("%I64d\n",s);
             }
}

• Re:100题贴代码 (439) qpyghb 2014-08-11 11:15:40
  • Re:100题贴代码 (15) qpyghb 2014-08-11 11:16:27
    • Re:100题贴代码 (23) qpyghb 2014-08-11 11:25:51